Alarm Computer Technology is a full-service security systems contractor specializing in state-of-the-art burglar alarm systems, fire alarms, CCTV systems, access control and audio systems. We currently service several thousand residential and commercial customers all over New England, as well as in New York, New Jersey, and Pennsylvania.
Founder and president Helder Lemos created Alarm Computer Technology in 1983. With nearly twenty-five years of experience in the security industry, and using our extensive product knowledge and customer-oriented approach, we will design a system that will meet all of your security needs, while keeping it affordable.

We are a licensed systems contractor and a member of the National Burglar and Fire Alarm Association. In addition, because we employ NBFAA-certified technicians, you can be assured that each system we design and install meets the industry's highest standards for quality and craftsmanship.

However, what really separates us from our competitors is our responsiveness to our customers' needs. With nearly two-thirds of our business coming from repeat clients, we have created a winning customer service formula that has made our customer base one of the most loyal in the security industry. High quality products, cutting-edge technology, expert installation and exceptional customer service...that is our mission and our pledge to each and every customer.

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